Exception in thread "main" java.io.IOException: XML does not contain saved bug data
	at edu.umd.cs.findbugs.SortedBugCollection.checkInputStream(SortedBugCollection.java:658)
	at edu.umd.cs.findbugs.SortedBugCollection.doReadXML(SortedBugCollection.java:211)
	at edu.umd.cs.findbugs.SortedBugCollection.readXML(SortedBugCollection.java:198)
	at edu.umd.cs.findbugs.SortedBugCollection.readXML(SortedBugCollection.java:180)
	at edu.umd.cs.findbugs.SortedBugCollection.readXML(SortedBugCollection.java:164)
	at edu.umd.cs.findbugs.workflow.Filter.main(Filter.java:439)
